Zircon’s popularity
began to grow in the sixth
century, when Italian
artisans featured the
stone in jewellery designs.
The brilliance of zircon
has captured the hearts
of those who set their
eyes on this magnificent
gemstone. During the Middle
Ages, zircon was believed
to contain remedial power,
protecting the wearer
from diseases and banishing
insomnia. The name "zircon"
is derived from the Arabic
words, "zar", meaning
gold, and "gun", meaning
color.
The two major suppliers
of Zircon are Thailand
and Cambodia, apart from
Vietnam, Burma, Sri Lanka
and Africa that supply
these marvelous gemstones
to the world market. There
are three natural types
of zircons: low, medium
and high. The variance
is due mainly to the differences
in the specific gravity
and refractive index.
Having the highest refractive
index among any natural
gemstones, with the exception
of diamonds, the brilliance
of high zircon is second
to none. Its refractive
index is purely dependent
on the temperature.
Despite its brilliance,
Zircon is quite brittle
and can easily be chipped
or scratched. A unique
characteristic of zircon
is that the light splits
into two rays as it passes
through the stone. As
a result, the back facets
appear as double images.
They are often blue or
colorless. Some of the
other color varieties
are yellow, orange, green,
and brown. The intensity
of color and clarity is
the most important criteria
and any presence of flaws
diminishes its value.